Weft detector in loom transferrer



Dec. 18, 1928.

v f Y 1,695,366

A. CEDERLUND WE'FT DETECTOR I'N LOOM TRANSFERRER Filed Nov.1o, 1927 ,6 5 4. f $1 la 60 6l 45' 4 5'2 J1 p 6e z e 40 44 ,3 34 e0 zz 61 .r aa

4, d 5 JEH/bed Ceder/md @il E mep-@WM Patented Dec. 18, 1928.

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ALBERT CEDERLUND, OF WORCESTER, MASSACHUSETTS, `Assrcfnon To onOMrTon a KNOWLES LOOM WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION or MASSACHUSETTS.

WEET DETECTOR IN LOOM TRANSFERRER.

Application filed. Noi-'einher of weft exhaustion indication which shall be substantially parallel to the surface being dei tected.

In- Patent No. 1,372,316 to Ryonthere is shown a weft detector mounted on arregularly moving transferrer and in several other patents detectors of this type lare shown, all of theinlemploying a pivoted yarn engaging detector. The transferrer arm itself moves about a pivot which isrelatively close to the surface being detected andfthere results an objectionable arcuate movement on the part of the detector as the transferrer moves downwardly around its supporting stud. The detector,

therefore, when in detecting contact with the yarn is being'acted onv to move in two diierent arcs, one of them around the pivot of the transferrer arm andthe other about the detector pivot.Y vThere-resultsa rolling Contact between the bobbin and detector7 the point of Contact moving rearwardly with respect to the detecting surface. The other angular motion is in a plane parallel to the bobbin being detected and because ot'it the teeth nearer the butt of the bobbin are lifted away from the detected surface and the teeth near the tip of the bobbin are brought into contact with the .surface so that there is a constantly changing relation betweenthe detector teeth and the yarn. Y

It is an important object of my present invention to mount the detector on the transferrer so. that the same will move ina substantially straight line which is parallel to the aXis of the bobbin being detected7 the detector sharingthepivotal movement of the transferrerarnr but having no pivotal movement of its own relatively to the transferrer arm. f i

With these and other objects inview which willv appear as the description proceeds, my invention residesfin the combination and arrangement o partshereinafter described and and set forth in the claims.

In the accompanying drawings wherein one form of my invention is shown7 Fig; 1 is a vertical central section through that partof the transferrer arm extending over the shuttle and showing the detector inl l0, i927. Serial No. 232,432.

Contact with a full supply ot yarn` with the indicating plunger Vin non-indicating position,

Fig. 2 is a viewsimilar to F ig. l but with the detector sliding along aV substantially eX- hausted supply of weft and with the plunger in indicating position,

Fig. 3 is a detailed. top plan view takenin the direction oi' arrow 3, Fig. l,

Fig. i is a detailed vertical section; online Of l,l y

Fig. 5 isa fragmentary horizontal section on line 5-5 of Fig. l,

Fig.. 6 is a vertical section on Fig. l, and

Fig. 7 'is a diagrammatic view of the transferrer` arm and its pivot. l

The transferrer arm 10 has a portion 11 extending over and substantially parallelto the bobbin B and has opposite spacedwalls nism of the detector is located; An' indi!l eating plunger 14Ck slidabie in the end of the transferrer arm and also in*y a web 1'5 is provided withv a notch 16' which` reecives Vthe hooked end of a latch 17. VSaid latch is-pivoted. on a pin 18 secured in the walls-12 and has a depending iinger 19 to cooperate with the detector carrier to be described. A tor-L sion spring 20 having the upper end extending over one of the walls 12 as shown in Fig. y3 and extending around a portiony ot the stud 18 and having the other end extend over the horizontaly part of the latch as at 2lserves to hold said latch normally in the position shown in Fig. 1, but permits upward yielding thereof under influence either of the detector carrier or the head 22 or the plunger 14. A compression spring 23 is located between a clip 24 secured to the transferrer arm and a shoulder 25 on the plunger and tends normally to move the latter towardsthe right from the position shown in Fig. 1. Any indicating leXer L' is positioned orfcooperation with the plunger andr when thelatter is inthe position shown in Fig. 2 it will engage the lever to rock the same asthe transferrer arm loof ics

the detector and the means for moving' the same relatively to the bobbin beingidetected and in carrying my invention into etliect l provide a slidingl detector carrier formed substantially as shown in Figs. 1 and G with the lower end thereof having a horizontal flat portion 31 which entends into the guide slots 32, there being one slot :formed on each of the walls 12 and the slots being opposite each other so as to receive the flat portion 31. A light tension spring 33 interposed between a portion ot the transiiorre" arm and sliding carrier 30 holds the latter yieldingly against a stop pin 34 tast on the transterrer arm.

The means for imparting motion to the carrier slide includes a rod 40 to the right end of which as shown in Fig. 1 is slidably mounted in bore 41 in the transiterrer arm and the lett end ot which is provided with a pair oi spaced pins 42 between which the shorter vertical portion 43 ot' the carrier stende. The left end of the rod entends through said portion 43 and by reason of the pins causes the carrier slide and rod 40 to move together in a. horizontal direction. An actuating levei` 44 is pivoted as at 45 to the transiterror arm and is normally held in the dotted line position shown in Fig. 1 against a stop pin 4G by means of a compression spring 47 on rod 40 located between a pin 48 on the rod and a Washer 49 which engages the forked end 5G of the lever 44. A substantially horizontal arm 51 is positioned for engagement with a yielding trip 52 of the type shown in patent to Ryon No. 1,551,219.

The detector element D as shown herein includes a square shank having. a pin 61 in the upper end thereof to limit downward movement, said detect-or extending through the upper horizontal portion 62 of the sliding carrier and also extending through the lower horizontal portion 31. A. light compression spring 63 surrounds the shank G0 and is located between the portion 62 and shoulder G4 formed on the detector element D as shown in lig. 6. The eitect oit said spring 63 is to hold the detector in down positionbut to permit the same to yield upwardly.

In operation the transferrer arm is swung downwardly around stud Si, 7, on every detecting beat oi the loom, as is set forth the aforesaid patent to Ryon, the detector being held yieldingly in its normal position by the spring 63 and the spring 47 being eirpanded to hold the lever 44 against the stop 46. rllhe spring 33 holds the carrier 30 to the left against the stop 34 and against the act-ion ot spring 4'?. Said spring 33 is so placed as to exert its torce substantially .in line with the guides for the lower portion 31 of the carrier. As the transterrer arm descends the horizontal arm `51 will engage the yielding trip 52 which in this instance is normally stationary but may yield. Vunder high pressure and the lever 44 will be acted on to latence@v latterto the right from the position shown in Fig. 1. rlhis tendency, however, does not arise until after the det cting surface 65 has been brought into Contact with the suriace to be detected, but soon as it does arise there is a torce acting against spring 33 tending to move the parts to the right oi' the pos'ticn shown in Fig. 1.

So long as suilicient yarn is present, however, the detector will be held against movement longitudinally of the bobbin, but when the yarn is substantially exhausted so that the bobbin presents insufficient holding contact with the detector the spring 4'? acting on pin 48 will move the rod 40 to the right to the position shown in Fig. 2, moving with it the carrier 30 and detector D. As the carrier moves to the right the horizontal portion 31 thereoi will'engage the finger 13 of the latch and rocl; the same around its pivot to the releasing position shown in Fil whereupon the couipre fion spring 23 u .ll move the indicating plunger to indicating position as yshown in Fig. 2. its the transterrer is raised said plunger will cooperate with the lever L to initiate a change in the loom. A t a later time in the upward mcveinent ot thetraus'errei arm the plunger is reset as shown in the ltyon Patent No. 1,551,219.

From the foregoing it will be seen that l have provided a detector which is mounted to move in a direction substantially parallel to the surface being detected and is also placed on a transterrer arm oi' al wei't replenishing loom so that although said arm turns around a relatively short radius yet the change between the detector surface and the surface being` detected is reduced to a minimum and is not possessed of the disadvantage inherent in detectors i'nounted on transferrer arms where the detector has an angular movement with respect to the transterrer arm.

Having thus described my invention it will be seen that changes and modifications may be mac e therein by those skilled in the art without departing from the spirit and` scope ot the invention and l do not wish to be limited to the details herein disclosedybut what l claim is:

1. ln weft detecting mechanism for a loom having a regularly movable t-rans'l'errer arm, an indicating plunger slidably mounted on the arm, a latch to hold the plunger in non-indicating position and yielding means to move the plunger to indicating position when the latch is moved to releasing position., a weft detector, and means to guide said wett detector en the transterrer arm tomove in a direction substantially parallel to the surface being detected at the time of indication. of Wett exhaustion, said means maintaining the detector in substantially the same angular posit-ion relatively to the surface being detected as the detector moves along the suri'ace being detected, said means moving into engagement with the latch when the detector moves to indicate exhaustion oi" Wett.

2. In wett detecting mechanism Jfor a loom having' a reO'ularl movable transferrer arm i, :a Y a an indicating plunger slidably mounted on the arm, a latch to hold the plunger in nonindieating position and yielding means to move the plunger to indicating position when the latch is moved to releasing position, a Wett detector member, and carrier member toi' the detector member slidably mounted on the transferrer arm and movable in a direction substantially parallel to the length ot the surface being detected, one of said members moving into engagement with the latch on an indicating beat ot' the loom.

3. In Wett detecting mechanism for a loom having a regularly movable transterrer arm, an indicating plunger slidably mounted on the arm, a. latch vto hold the plunger innenindicating position and yielding means to move the plunger to indicating position. when the latch is moved to releasing pesition, a ive't't detector, a carrier for the detector slidably mounted on the transierrer arm to move in a direction substantiallgT parallel to the lengt-h of the surface being detected, and yielding means interposed between the detector and the ear- 'rier and tending to hold the `detector nermally in low position relatively to the carrier and yielding When the detector engages a sufficient supply ot weft. and is moved upwardly relatively to the carrier.

4. In wett detecting mechanism for a loom having a. regularly movable transterrer arm, an indicating plunger slidably mounted on the arm, a latch to hold the plunger in non-indicating position and yielding means to move the plunger to indicating position when the latch is moved to releasing position,

.a detector carrier slidable on the transferrer tire surface l being detected, and a Wett detector mounted on the carrier, said detector preventing movement et the carrier when sutlicient Wett is present and said carrier being movable into engagement with the latch when insutticient Wett is present.

In Wett detecting mechanism for a leoni having a regularly movable transteirer arm, an indicating plunger slidably mounted on the arm a latch te hold the plunOer in non-l into engagement with the latch when insu't'- f iieient Wett is present.

G. In wett detecting)` mechanism for a loom having a regularly movable transterrer arm, an indicating plunger slidably mounted lon the arm, a latch to hold the plunger in nonindicating position and yielding means to more the plunger to indicating posit-ion when the latch is moved to releasing position, a

'detector carrier member slidably mounted en the transterrer arm in the direction et the leng 4li et the surface being detected, a rod connected to the carrier member and guided for slidingmovement parallel to the movenient et said member, yielding means to eX- ert a torce on the rod each detecting beat of the loom tending to move said red and cairier member in a direction toward the latch,

and weit detector member mounted on the carrier member to prevent movement et the latter toward the latch when suiiicient Weit is present, said yielding means moving one ot the members into engagement With the latch to release the `lat-ter when insucient wett is present.

In testimony whereof I have hereunto afiiXed my signature. f

ALBERT CEDERLUND. 

